Jay, Douglas, author
Faber & Faber, 1946
Buku Teks
Montgomery, Rex, author
Mosby, 1990
Buku Teks
Donohue, Rebecca K., author
Appleton & Lange, 1999
Buku Teks
Solso, Robert L., 1933-, author
Boston, 2002
Buku Teks
Weiss, Leonard W., author
McGraw-Hill , 1982
Buku Teks